tara mergener tells us both campaigns are now dialing down expectations. >> reporter: president obama and mitt romney get their first chance to put their policies side by side this week. wednesday's debate at the university of denver will focus on domestic policy. >> what i am most concerned about is having a serious discussion about what we need to do to keep the country growing. >> reporter: a new poll shows 56% of registered voters think the president will win the match up. he tried to lower expectations at a rally on sunday. >> i know folks in the media are speculating already on who will have the best zinger and tut with most points on the board. governor romney is a good day bator. i am just. >> reporter: the president is staying in nevada to prepare for the debate and romney is heading to colorado today. new jersey chris christie said romney is capable of a good debate. >> this whole race will turn upsetdown come thursday morning. >> i don't think one event will make or break there campaign. >> reporter: romney is trailing in the polls in most must-win states and voters, he say